The smart cup that knows exactly what you're drinking - and tells you how many calories it contains (and when you've had enough alcohol)

Health-related gadgets are all the rage these days, from smart wristbands to apps that track what you consume.

But a new device from San Francisco-based Mark One, called Vessyl, claims to be able to streamline the process by putting all the technology you need in a cup.

The product can accurately identify your drink, tell you how many calories you are consuming, let you know how hydrated you are, and alert you when it’s time to drink again.

The device is available to pre-order now for £59 ($99), with a retail price of £117 ($199) from Vessyl’s website.

It will begin shipping in early 2015.

The cup is made of a glass-like material and holds 13 oz (385ml) of liquid.

When a beverage is poured in, from orange juice to beer, text on the side reveals what drink is inside.

The sliding lid of the cup is spill proof and it has a non-stick interior, making it easy to clean according to the company.

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